Tasks completed: 3/3
- Create JKChatComposer component with textarea and send button
- Add keyboard handling for Enter and Shift+Enter
- Add character count validation feedback
SUMMARY: .planning/phases/09-message-composition/09-01-SUMMARY.md
- Controlled textarea for message input (1-255 chars after trim)
- Character count display (X/255) with color-coded feedback
- Enter to send, Shift+Enter for newline
- Disabled states: disconnected, sending, invalid input
- Validation messages for error states
- Error display for send failures
- React.memo and useCallback optimizations
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Test button visibility in session navigation
- Test badge hidden when unread count = 0
- Test badge shows correct count (1-99)
- Test badge shows "99+" for counts >= 100
- Test button opens chat window
- Test duplicate window prevention
- Test badge resets when window opens
- 7 comprehensive test cases
- Added JKSessionChatButton import
- Replaced placeholder Chat button with new component
- Passes sessionId prop from Redux state
- Button positioned after Open menu, before Attach button
- Displays chat icon from assets
- Badge shows unread count (1-99) or "99+" for 100+
- Badge hidden when count = 0
- Reduced opacity when window already open
- Click handler opens chat window and sets active channel
- useCallback for handleClick optimization
Replace placeholder content with JKChatMessageList component:
- Import JKChatMessageList
- Remove placeholder div with text
- JKChatMessageList handles its own styling (flex: 1, padding, scroll)
- Update component documentation
Chat window now displays:
- Header with channel name and close button (fixed top)
- Message list with auto-scroll (scrollable, flex: 1)
- Loading spinner when fetching history
- Empty state when no messages
- Individual messages with avatars and timestamps
Layout follows flexbox pattern with header fixed and message list
filling remaining space with independent scrolling.
Ready for Plan 8.3 (Chat Button & Unread Badge).
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
GREEN phase: Create message list component with:
- Redux integration (activeChannel, messages, fetchStatus selectors)
- Auto-scroll logic with scroll state management
- Scroll to bottom on mount and new messages
- Disable auto-scroll when user scrolls up
- Re-enable auto-scroll when user scrolls to bottom (50px threshold)
- 300ms debounce for scroll detection
- Loading state (JKChatLoadingSpinner)
- Empty state (JKChatEmptyState)
- Message rendering (JKChatMessage components)
Auto-scroll behavior:
- isUserScrolling state tracks manual scrolling
- scrollToBottom helper with smooth scrolling
- isAtBottom detects bottom position (50px threshold)
- handleScroll debounces scroll events (300ms)
- Cleanup timeout on unmount prevents memory leaks
Mock Element.prototype.scrollTo in tests (not available in JSDOM).
All 3 tests passing:
- Empty state display
- Loading spinner display
- Message rendering
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
RED phase: Create test file with 3 test cases:
- Shows empty state when no messages
- Shows loading spinner when fetching
- Renders messages when available
Install @testing-library/react@12 and @testing-library/jest-dom@5
(compatible with React 16).
Create setupTests.js for jest-dom matchers.
Tests fail as expected (component not implemented yet).
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Create two stateless components for chat UI states:
1. JKChatLoadingSpinner:
- Displays spinner from reactstrap
- Shows "Loading messages..." text
- Used when fetchStatus is 'loading'
2. JKChatEmptyState:
- Shows chat icon and encouraging message
- Used when message list is empty
- Centered layout with friendly copy
Both components are simple, stateless, and require no props.
Inline styles used for MVP (SCSS styling deferred to Plan 8.3).
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Create individual message display component with:
- Avatar with initials (first + last name initial)
- Sender name in bold
- Relative timestamp using formatTimestamp utility
- Message text with word wrapping
- Inline styles for MVP (SCSS styling deferred to Plan 8.3)
- React.memo for performance optimization
- PropTypes validation
Component follows established React patterns with functional components,
hooks, and proper documentation.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
GREEN phase: Implement timestamp formatting with dayjs:
- Returns "Just now" for messages < 1 minute old
- Returns "X minutes ago" for messages < 1 hour old
- Returns "X hours ago" for messages < 24 hours old
- Returns "Yesterday" for messages 1 day old
- Returns day name (e.g., "Monday") for messages < 7 days old
- Returns MM/DD/YYYY format for older messages
- Handles invalid input gracefully (returns empty string)
All 6 tests passing.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
RED phase: Create test file with 6 test cases for timestamp formatting:
- "Just now" for messages within last minute
- "X minutes ago" for messages within last hour
- "X hours ago" for messages within last day
- "Yesterday" for previous day messages
- Date format (MM/DD/YYYY) for older messages
- Graceful handling of invalid dates
Install dayjs for timestamp formatting utility.
Tests fail as expected (utility not implemented yet).
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Fixed ESLint import/first error on line 317
- Moved createSelector import to top with other @reduxjs/toolkit imports
- Blocking issue preventing dev server startup
- Add 08-01-SUMMARY.md with accomplishments and metrics
- Update STATE.md: Phase 8 progress to 1/3 plans complete
- Update ROADMAP.md: Mark plan 08-01 complete
- Ready for Plan 08-02 (Message List & Auto-Scroll)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add storage format example (JSON structure)
- Document error handling strategy (graceful degradation)
- Explain quota exceeded and parse error behaviors
- All 8 localStorage tests still passing after refactoring
Part of Phase 7 Plan 3 (WebSocket Integration & Selectors)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Import saveLastReadAt and loadLastReadAt utilities
- Load lastReadAt from localStorage on Redux store initialization
- Save to localStorage when openChatWindow action is dispatched
- Save to localStorage when markAsRead action is dispatched
- All 68 Redux tests still passing after integration
- All 8 localStorage tests passing
Part of Phase 7 Plan 3 (WebSocket Integration & Selectors)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add saveLastReadAt: saves timestamp with merge support
- Add loadLastReadAt: loads all timestamps with parse error handling
- Add clearLastReadAt: clears specific channel or all channels
- All functions handle localStorage errors gracefully (quota, parse errors)
- Storage key: 'jk_chat_lastReadAt'
- All 8 tests passing (GREEN phase)
Part of Phase 7 Plan 3 (WebSocket Integration & Selectors)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add comprehensive JSDoc with usage descriptions for all 8 selectors
- Document memoization behavior (when selectors recompute)
- Add @private tags to input selectors
- Document return value types and defaults (empty arrays, 0, idle states)
- Clarify channel ID parameter (session ID, lesson ID, or 'global')
- All 68 tests still passing after refactoring
Part of Phase 7 Plan 3 (WebSocket Integration & Selectors)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add selectChatMessages: returns messages for channel with memoization
- Add selectUnreadCount: returns unread count for channel
- Add selectTotalUnreadCount: sums all unread counts across channels
- Add selectIsChatWindowOpen: returns window open state
- Add selectActiveChannel: returns active channel ID
- Add selectFetchStatus: returns fetch status for channel
- Add selectSendStatus: returns send status
- Add selectSendError: returns send error message
- All selectors use createSelector from Redux Toolkit for memoization
- All 68 tests passing (GREEN phase), including 15 selector tests
Part of Phase 7 Plan 3 (WebSocket Integration & Selectors)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add test structure for selectChatMessages, selectUnreadCount, selectTotalUnreadCount
- Add test structure for selectIsChatWindowOpen, selectActiveChannel
- Add test structure for selectFetchStatus, selectSendStatus, selectSendError
- All 8 tests failing (RED phase) - selectors not yet implemented
- Mock state with multi-channel messages and unread counts
Part of Phase 7 Plan 3 (WebSocket Integration & Selectors)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add comprehensive JSDoc to getChannelKeyFromMessage helper
- Document channel key mapping logic (session, lesson, global)
- Add JSDoc to CHAT_MESSAGE handler with unread increment rules
- Extract shouldIncrementUnread for clarity
- All tests still passing after refactoring
Part of Phase 7 Plan 3 (WebSocket Integration & Selectors)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add CHAT_MESSAGE handler to useSessionWebSocket callbacks
- Transform Protocol Buffer format (msg_id, user_id, etc.) to Redux format
- Construct channel keys: session uses sessionId, lesson uses lessonSessionId, global uses 'global'
- Implement unread increment logic: increment if window closed OR viewing different channel
- Use useSelector to access chat state for unread count logic
- Extract getChannelKeyFromMessage helper function for reusability
- All 14 tests passing (GREEN phase)
Part of Phase 7 Plan 3 (WebSocket Integration & Selectors)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- Add 15 tests for message transformation from Protocol Buffer to Redux format
- Test channel key construction for session, lesson, and global messages
- Test unread count increment logic based on window state
- Test WebSocket integration (register/unregister, dispatch actions)
- All tests failing (RED phase) - handler not yet implemented
Part of Phase 7 Plan 3 (WebSocket Integration & Selectors)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Extract createOptimisticMessage helper function:
- Improves code clarity and maintainability
- Centralizes optimistic message structure
- Makes testing easier if needed in future
- All tests still passing
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Add sendMessage async thunk with complete optimistic UI flow:
- pending: Adds optimistic message immediately with temp ID
- fulfilled: Replaces optimistic message with real server response
- rejected: Removes optimistic message and sets error
- Optimistic messages marked with isOptimistic flag
- Channel initialization if not exists
- Preserves existing messages during replace/remove operations
All 53 unit tests passing.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Add unit tests for sendMessage optimistic UI flow:
- Test pending sets loading status
- Test pending adds optimistic message immediately
- Test pending initializes channel if needed
- Test fulfilled replaces optimistic message with real one
- Test rejected removes optimistic message
- Test other messages preserved during replace/remove
Tests fail as expected - async thunk not yet implemented.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Add fetchChatHistory async thunk with complete lifecycle handling:
- pending: Sets loading status and clears errors
- fulfilled: Adds messages with deduplication and sorting
- rejected: Sets error status with error message
- Message deduplication by ID to prevent duplicates
- Chronological sorting (createdAt ASC) after prepending
- Pagination cursor storage in nextCursors state
- Handles both session and global channels
All 46 unit tests passing.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Add unit tests for fetchChatHistory extra reducers:
- Test pending state sets loading status
- Test fulfilled state adds messages and updates status
- Test message deduplication on fulfilled
- Test pagination: prepending older messages
- Test rejected state sets error
- Test null cursor handling
Tests fail as expected - async thunk not yet implemented.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Implement chat API methods using native fetch:
- getChatMessages: Fetch messages with pagination support
- sendChatMessage: Send messages to session/global channels
- URL construction with URLSearchParams for clean query strings
- Error handling for all HTTP status codes
- Credentials and headers included for session auth
- JSDoc comments for API documentation
All 14 unit tests passing.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Add comprehensive unit tests for getChatMessages and sendChatMessage:
- Test session and global channel message fetching
- Test pagination cursor (before parameter)
- Test all HTTP error codes (403, 404, 422, 500)
- Test request headers and credentials
- Test error handling with invalid JSON responses
Tests fail as expected - functions not yet implemented.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
GREEN phase of TDD for Task 3:
- Implement markAsRead: resets unread count to 0, updates lastReadAt timestamp
- Implement incrementUnreadCount: safely handles missing channels
- Implement setWindowPosition: stores UI position for WindowPortal
- Export all 7 action creators from slice
- Complete sessionChatSlice with full reducer suite
All 40 tests pass including 3 integration tests:
- Complete flow validates message receiving, channel switching, window state
- Multi-channel flow validates independent unread counts per channel
- Deduplication test validates WebSocket + REST double-message scenario
Ready for async thunks in Phase 7 Plan 2.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
GREEN phase of TDD for Task 2:
- Implement addMessageFromWebSocket with full logic:
* getChannelKey helper for session vs global channel keys
* Channel initialization on first message
* Message deduplication by msg_id using Array.some()
* Sort messages by createdAt after insertion
* Unread increment: only if window closed OR viewing different channel
- Implement setActiveChannel: sets activeChannel + channelType
- Implement openChatWindow: sets isWindowOpen, resets unread count, updates lastReadAt
- Implement closeChatWindow: sets isWindowOpen false only
- Export all 4 action creators
All 28 tests pass. Message deduplication validated.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
GREEN phase of TDD:
- Create sessionChatSlice.js with complete initial state
- All 12 state fields match CHAT_REDUX_DESIGN.md specification
- Multi-channel architecture: messagesByChannel keyed by channel ID
- Unread tracking: unreadCounts, lastReadAt per channel
- State machines: fetchStatus/error per channel, sendStatus/error global
- Pagination support: nextCursors per channel
- UI state: isWindowOpen, windowPosition
- Register slice in store.js as sessionChat reducer
All 13 tests pass. Ready for reducers in Task 2.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Nuwan